Beta RR 4T - 525 - Page 159

1
GENERAL INFORMATION
96
GB
ENGINE
Type ................................................... Single cylinder, 4-stroke, liquid-cooled
with countershaft and electric starting
Bore x stroke RR 250 ............................................................ 75 x 56,5 mm
Bore x stroke RR 400 ............................................................... 89 x 64 mm
Bore x stroke RR 450 ............................................................... 89 x 72 mm
Bore x stroke RR 525 ............................................................... 95 x 72 mm
Displacement (cm
3
) RR 250 ............................................................ 250 cm
3
Displacement (cm
3
) RR 400 ............................................................ 398 cm
3
Displacement (cm
3
) RR 450 ............................................................ 448 cm
3
Displacement (cm
3
) RR 525 ............................................................ 510 cm
3
Compression ratio RR 250 .................................................................. 12:1
Compression ratio RR 400 - RR 450 - RR 525 ........................................ 11:1
Carburetor .................................................................................. see table
Type Keihin FCR-MX 37 Keihin FCR-MX 39 Keihin FCR-MX 39 Keihin FCR-MX 39
Carburator-setting number 3700A 3900A 3900A 3900B
Main jet 160 178 178 178
Jet needle OBEKT OBDVR OBDVR OBDVT
Idling jet 42 42 42 42
Main air jet 200 200 200 200
Idling air jet 100 100 100 100
Needle position 3. rd from top 3. rd from top 3. rd from top 3. rd from top
Starting jet 85 85 85 85
Mixture control screw open 0,75 1,25 1,25 1,25
Slide 15 15 15 15
Performance restrictor slide stop slide stop slide stop slide stop
Stop pump membrane 858/2,15 mm 858/2,15 mm 858/2,15 mm 858/2,15 mm
Hot start device - - - -
RR 250
RR 400 RR 450
RR 525